133379191 has 16 divisors (see below), whose sum is σ = 153101088. Its totient is φ = 115084800.

The previous prime is 133379173. The next prime is 133379243. The reversal of 133379191 is 191973331.

It is not a de Polignac number, because 133379191 - 2⁵ = 133379159 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 133379191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133379131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12691 + ... + 20683.

It is an arithmetic number, because the mean of its divisors is an integer number (9568818).

Almost surely, 2^133379191 is an apocalyptic number.

133379191 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

133379191 is a deficient number, since it is larger than the sum of its proper divisors (19721897).

133379191 is a wasteful number, since it uses less digits than its factorization.

133379191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8082.

The product of its digits is 15309, while the sum is 37.

The square root of 133379191 is about 11548.9909083002. The cubic root of 133379191 is about 510.9315168200.

The spelling of 133379191 in words is "one hundred thirty-three million, three hundred seventy-nine thousand, one hundred ninety-one".